US3689617A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for extrusion of interlaced webs
Assignee: FMC Corp
•
Filing: 1971-02-05
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Granted: 1972-09-05
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Expires: 1991-02-05
Abstract
Abstract A method of making a woven web by extruding a series of spaced streams of flowable strand-forming material in each of two laterally spaced, parallel planes, with the streams in one of such planes being staggered with relation to the streams in the other of such planes. These streams are then moved simultaneously, first transversely in such planes with the streams in one of such planes moving in a direction opposite to the streams in the other of such planes, and then in a direction substantially perpendicular to such planes. The extruded streams are set preferably prior to contact therebetween.
Inventors
- 👤 Theodore H Fairbanks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:47
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/301; B29C48/03; B29C48/05; B29C48/07; B29C48/08; B29C48/13; B29L; B29L2028/00; Y; Y10; Y10S; Y10S264/00; Y10S264/81
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
150 words
A method of making a woven web by extrusion including the steps of continuously extruding in a vertical direction from individual extrusion openings a series of spaced streams of flowable strand-forming material in each of two laterally spaced, generally parallel planes, with the streams in one of such planes being staggered with relation to the streams in the other of such planes, simultaneously moving streams like distanCes in each of the parallel planes at their points of extrusion by shifting individual extrusion openings first transversely in such planes, with streams in one of such planes moving in a direction opposite to and crossing with streams in the other of such planes, and then perpendicularly to such planes, with individual streams moving bodily from each of such planes to the other thereof, continuously repeating the above sequence of steps and setting the extruded streams to provide a woven pattern of strands.
Claim 2
Independent Claim
150 words
A method of making a woven web by extrusion including the steps of continuously extruding in a vertical direction from individual extrusion openings a series of spaced streams of flowable strand-forming material in each of two laterally spaced, generally parallel planes, with the streams in one of such planes being staggered with relation to the streams in the other of such planes, simultaneously moving streams like distanCes in each of the parallel planes at their points of extrusion by shifting individual extrusion openings first transversely in such planes, with streams in one of such planes moving in a direction opposite to and crossing with streams in the other of such planes, and then perpendicularly to such planes, with individual streams moving bodily from each of such planes to the other thereof, continuously repeating the above sequence of steps and setting the extruded streams to provide a woven pattern of strands.
Claim 3
Dependent Claim
32 words
A method as defined in claim 1 wherein each series includes a like number of streams and wherein the spacing between certain of the streams in both series is substantially the same.
Claim 4
Dependent Claim
40 words
A method as defined in claim 2 wherein each movement of streams in a direction transversely in the planes of extrusion is equal to at least one half of the spacing between adjacent streams in the respective series of streams.
Claim 5
Dependent Claim
40 words
A method as defined in claim 2 wherein streams between outermost streams of the two series of streams are moved in the same direction transversely in the planes of extrusion after each movement thereof from one plane to the other.
Claim 6
Dependent Claim
36 words
A method as defined in claim 4 wherein the transverse movement of the outermost streams of the two series of streams is reversed after such streams have been moved from one plane to the other thereof.
Claim 7
Dependent Claim
24 words
A method as defined in claim 1 wherein the extruded streams are set at least along the surface thereof prior to any contact therebetween.
Claim 8
Dependent Claim
16 words
A method as defined in claim 1 wherein the extruded streams are set after contact therebetween.
References Cited (Backward Citations)
CH380369A
Cited
US3012275A
Cited
US3360410A
Cited
US3331903A
Cited
US3562046A
Cited
US3579729A
Cited
US3591892A
Cited
US3591894A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |